typescript 打字稿中动态键的接口
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Interface for dynamic key in typescript
提问by Manuel Schiller
I have an Object like this that is created by underscore's _.groupBy()method.
我有一个这样的对象，它是由下划线的_.groupBy()方法创建的。
myObject = {
"key" : [{Object},{Object2},{Object3}],
"key2" : [{Object4},{Object5},{Object6}],
...
}
How would I define that as an Interface with TypeScript?
i don't want to simply define it as myObject:Object = { ...but rather have an own type for it.
我如何将其定义为 TypeScript 的接口？我不想简单地将它定义为，myObject:Object = { ...而是想为它定义一个自己的类型。
回答by Bruno Grieder
Your object looks like a dictionary of Objectarrays
你的对象看起来像一个Object数组字典
interface Dic {
[key: string]: Object[]
}
回答by Mikael Couzic
There's now a dedicated Recordtype in TypeScript:
RecordTypeScript现在有一个专用类型：
const myObject: Record<string, object[]> = { ... }
Also, consider typing the keys whenever possible:
此外，请考虑尽可能键入键：
type MyKey = 'key1' | 'key2' | ...
const myObject: Record<MyKey, object[]> = { ... }
回答by Asutosh
don't know about interface, for dynamic objects we can go something like this:
不知道接口，对于动态对象，我们可以这样做：
let memoTable: { [k: number]: number } = {};
memoTable[1]=5;
memoTable[2]=7;
回答by Kriti
Instead of using Object as a type use Record
而不是使用对象作为类型使用记录
interface myObjInterface {
[key: string]: Record<string, any>[]
}
回答by zemil
I would suggest a solution with Map, maybe for someone it will be useful:
我会建议使用 Map 的解决方案，也许对某人有用：
type TKey = 'key1' | 'key2' | 'key3';
type TValue = object[];
type TMapper = Map<TKey, TValue>; // But also you can use Record instead of Map
